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This AI book summary app ran 2 UGC campaigns with 8.5M views

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October 23, 2025· 3 min read

SoBrief is a book summary app that launched 220 days ago.

Their first UGC campaign went live two months back.

They saw some traction from that campaign but eventually paused it. One Spanish-based creator stood out, pulling in 1.6M views on a single video.

Now, they're running a second round of videos and accounts, which are performing noticeably better.

One of their accounts focuses on testing and repeating viral hooks that tend to work.

i love genz because wdym someone made a Tinder for BOOKS

i waisted the ENTIRE day book shopping and i JUST found this now… like wtf

I've spent 3 HRS book shopping and i just found this now… like wtf

POV it's day 68 of 75 hard and you JUST found this… like wtf

Her signature pattern is the consistent use of "like wtf" at the end of each hook.

Another account, @readbykenna, had one or two strong videos back in June but has since plateaued at around 1k-2k views per post.

The two other active accounts are run by Nessa and Jules - creators who have also made viral content for apps like Outside, BibleChat, and CoupleJoy. We covered that in more detail here: https://www.socialgrowthengineers.com/56057400-views-for-3-apps-one-creator.

You can find all their accounts listed here: https://app.shortimize.com/c/2b10J3ju6iPBzn

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